近几年来,全国各地常见因使用有毒蔬菜而发生中毒事故的报道。蔬菜污染已成为一个越来越突出的社会性问题,污染源主要来自农药、重金属、硝酸盐和各种有害生物(如有害微生物、寄生虫卵等)。我国绿色蔬菜(即无公害蔬菜)的研究和生产已提出了近20年,许多研究领域和生产推广工作都取得令人瞩目的成绩。但在很多地方,无公害蔬菜的生产只限于少量的温室无土栽培,而普通入在农贸市场上购买蔬菜(如豇豆)还是以传统方法生产出来的为主,农药等有毒、有害物污染还十分严重。 In recent years, poisoning accidents have been reported in many parts of the country due to the use of toxic vegetables. Vegetable pollution has become an increasingly prominent social problem. The sources of pollution are mainly pesticides, heavy metals, nitrates and various pests (such as harmful microorganisms, parasite eggs, etc.). The research and production of green vegetables in our country (ie pollution-free vegetables) have been put forward for nearly 20 years and many remarkable achievements have been made in many fields of research and production promotion. However, in many places, the production of pollution-free vegetables is limited to a small amount of greenhouse soilless cultivation, while the ordinary purchase of vegetables (such as cowpea) in the farmers market is still mainly produced by traditional methods. Poisonous and harmful pesticide pollution Very serious.